Analisis parameter dosimetri antara teknik intensity modulated radiotherapy (IMRT), volumetric modulated arc therapy (VMAT), dan helical tomotherapy (HT) pada hippocampal sparing whole brain radiotherapy (HS-WBRT) = Dosimetric analysis of intensity modulated radiotherapy (IMRT), volumetric modulated arc therapy (VMAT) and helical tomotherapy (HT) in hippocampal sparing whole brain radiotherapy.